Banner EZ-ARRAY USB Serial Adapter - Manual (Page 23)

P/N 130426 Rev. C 21
Banner Engineering Corp. • Minneapolis, U.S.A.
www.bannerengineering.com • Tel: 763.544.3164
A-GAGE EZ-ARRAY
Instruction Manual
Receiver Interface
Because single-edge scan is capable only of measuring the
height of an opaque object that blocks the bottom channel
and all channels up to the height of the object, the pertinent
measurement modes are LBB (last beam blocked) or TBB
(total beams blocked). When single-edge scan is selected, the
selected measurement mode will be applied to both analog
outputs. Selection of OD/ID with single-edge scan will result in
an error code.
Measurement Modes (S3 and S4)
The measurement modes, determined by switches S3 and S4
in combination, define what information is calculated by the
sensor and sent via the analog outputs. See Section 1.10 for
measurement mode definitions. Discrete output 1 will conduct
when analog output 1 detects a target. (If single-edge scan is
selected, select measurement mode LBB or TBB.)
During normal operation, the 3-digit diagnostic display reads out
the numerical value of the specified measuring mode for analog
output 1.
Analog Slope (S5)
Switch S5 defines the analog output slope. As the measurement
mode values increase, the analog output voltage can either
increase (positive slope, S5 ON) or decrease (negative slope, S5
OFF). Switch S5 applies the same slope to both analog outputs.
Complementary / Alarm (S6)
Switch S6 defines the operation of discrete output 2. When the
receiver user interface is used, discrete output 1 is active when
an object is detected by the sensor (normally open operation).
In complementary mode (S6 ON), output 2 will always be in the
opposite state of output 1. In alarm mode (S6 OFF), discrete
output 2 will be active when the sensor detects a system fault.
System faults include a failed emitter, mis-wiring of the emitter/
receiver communication wire (the pink wire), and low excess gain
(if the sensor is configured for high-contrast sensitivity).
4.2 Alignment / Blanking Button (Electronic Alignment)
The Alignment/Blanking push button is used both to maximize
the alignment and to access the blanking feature. The electronic
alignment routine adjusts the emitted light level to maximize
sensor performance. Perform the procedure at installation
and again when the emitter and/or receiver is moved. For PC
interface software alignment instructions, see Section 5.5.
Blanking is used to maintain sensing accuracy in applications
where a fixed object (for instance a permanently mounted
bracket) will block one or more beams. The sensor will ignore
the blanked channels when calculating outputs from the selected
measurement modes.
Electronic Alignment and Blanking — Receiver Interface
To initiate the electronic alignment procedure, use a small
screwdriver to press the Alignment/Blanking button for two or
more seconds. The left-hand digit of the 3-digit display will read
“A” (representing alignment); the right two digits will show the
number of beams blocked. The receiver is learning the clear
condition. Rotate the sensors as required (but do not change
the distance between them). When the receiver’s 3-digit display
shows 0 beams blocked, the sensors are adequately aligned.
Tighten the sensor mounts, then press the Alignment/Blanking
button again for two seconds to exit alignment mode. If all
sensor light channels are clear, the EZ-ARRAY stores each
channel’s signal strength in non-volatile memory and reads
“ - - - ” on the 3-digit display. Re-alignment is not required again,
unless the emitter or receiver is moved.
If any beams are blocked by objects other than the sensing
target to be measured during run mode, those beams can be
blanked in alignment mode for more accurate measurement.
The blocked beams must be either blanked or cleared during
alignment mode for alignment to proceed (see below). While
the “A” is visible on the receiver display, momentarily (about 0.5
seconds max.) press the Alignment/Blanking button again. The
“A” will change to “n” to indicate the sensor is ready to “learn”
the blanking pattern; momentarily press the button again to exit
the blanking routine. The sensor blanks the blocked beams and
the display changes to “A.”; the period following the lefthand digit
signifies blanking is active. Press the Alignment/Blanking button
for two seconds to exit alignment mode. The EZ-ARRAY stores
each channel’s signal strength in non-volatile memory and reads
“
-. - - ” on the 3-digit display to denote blanking is in use.
Flashing “000” on the 3-Digit Display
When returning to run mode, the receiver determines whether
any unblanked beam channels are obstructed. If any channels
are obstructed, the new alignment settings are not saved; the
receiver flashes zeroes on the display three times and sensing
will continue, using the previously set alignment settings. If this
occurs, either clear the blocked beams and repeat the alignment
routine or repeat the alignment routine and blank the blocked
beams.
4.3 Gain (Sensitivity Adjust) Button
To change the sensitivity (Gain setting), press and hold the
button for two seconds. The left-hand digit of the 3-digit display
will read “
l
”; the right-hand digit will read “1” (high excess-gain)
or “2” (low-contrast. The sensitivity level can then be toggled
between the values 1 and 2. When the desired sensitivity level
is displayed, hold the Gain push button for 2 seconds and the
sensor will return to run mode.